Brito, T. de, Marina P. Sandoval, Ana G. Silva, R. C. Saad, and W. Colaiacovo. 1996. “ Intestinal Spirochetosis: First Cases Reported in Brazil and the Use of Immunohistochemistry As an Aid in Histopathological Diagnosis ”. Revista Do Instituto De Medicina Tropical De São Paulo 38 (1): 45-53. https://revistas.usp.br/rimtsp/article/view/29337.